Book covers



1 D 7, 1965 M. D. YOUNG 3,222,085

BOOK COVERS Filed May 16, 1962 2 Sheets-Sheet 1 F is. 3 INVENTOR. MAMIE D. YOUNG Dec. 7, 1965 M. D. YOUNG 3,222,085

BOOK COVERS Filed May 16, 196

2 2 Sheets-Sheet 2 1A 1 1A 1A INVENTOR.

1k 1 9- 9 MAMIE. D. You-e United States Patent 3,222,085 1309K COVERS Mamie Dodson Young, 3201 St. John Drive, Dallas, Tex. Filed May 16, 1962, Ser. No. 195,295 4 Claims. (Cl. 281-34) This invention relates to book covers and more particularly to a multiple, adjustable, moisture proof, flexible, pliable and improved book cover of functional weight and guage materials for the protection of books and their bindings.

Another item of interest is that in some states the law requires that the state-furnished text books he covered, and my invention of these plastic transparent covers will meet these requirements, and prolong the life of school text books and library books.

Another important object is the distribution of the book covers as an advertising specialty item. The covers will be sold also as commercial items, and as decorative covers for old, unattractive books.

It is of interest that my book covers are an entirely new product in the production field, to the extent that they will require specially constructed attachments to be added to the now existing machinery for the cutting, and stacking and the application of the adhesives with the protective coverings. The pliability of this very flexible material, and the requirement of proper cutting dies which are essentials will have to be met.

Now calling special atttention to the materials which are of the utmost importance with this invention and which will be employed in the production of the book cover, and is in functional correlation and coordination with the mechanics of this invention and its requirements, and this material is of sufficient functional guage and weight, and is pliable, flexible, and moisture proof, and the transparent, translucent, and embossed opaque material with the above obligatory qualities is to be used, however, not restricting the invention to any one material, or group of materials having these qualifications.

These covers will be cut from one or more pieces of material and produced as an integral rectangular shape of desired and useful sizes. The book covers are adjustable to height, thickness and width, and may cause additional material to be adhered to, and fastened to an original size to enlarge the book covers to over sizes.

Another important object is the mechanical function of the invention with regard to the application of the book cover to a book and particularly to the center back title spine of a book. This center back title spine of a book bears the blunt of wear both to its edges and to the hinges of the book. The functional pliability and Weight of this obligatory material correlated with the mechanical arrangement of the invention enables and furnishes a complete enclosure for the title spine of the book without distortion or bulging of the binding and enables a new, longer usage of the book. This enclosure of these edges of the book is accomplished by folding over and tucking the material over the edges of the title spine of the book and into the openings created at each end of the center back when the book is opened and is between the bound pages and the books binding and by this same section of the cover and its specified mechanics the height and thickness of a hook to be covered is determined, and these constituent parts of the cover are new over prior covers.

Another object of the book cover in the application of the cover to a book and its mechanical improvements is with the identification points which may be perforated openings and which are located advantageously in the corners of the book covers and are functional and coordinated to the underlying longitudinal sections of the cover for Patented Dec. 7, 1965 "ice the positioning and outlining of the slits or slits to be cut, and through which the hook corners are to be hooked and sealed. The right is reserved to conform the identification points to the functional coordinating required, correlating the identification points to insure a snug fitting corner and also for creating an attractive advertising specialty item, and are further described in the specifications and drawings.

Another important object with my invention is the improvement in the corners of my book cover over prior cov ers by the use of hooks having identification points which may be perforated openings which are hooked through slits in the underlying longitudinal sections, and by the use of adhesives requiring a removable protective covering a very strong secure control is created and furnished the corners, and to seal the corners after they are hooked into position creates a double protection against hard usage. It is a known fact that hooks are of the earliest origin, however, hooks having identification points with the specific qualification with relation to functional coordination and correlation of purpose to book covers are new and improved, and constitute an important feature of this invention, and these hooks and identification points may also be used as the functional base for receiving pictorials.

Another new and important object of this invention is the use of a double-faced adhesive having protective coverings and this adhesive is especially required for the sealing together of this obligatory material.

Other objects and advantages will be apparent from the specifications and drawings.

Drawings.-The figures shown in connection with the various views are cited as examples of the mechanical function, coordinating, and correlating the invention as a useful item, and showing the divergence in the character of the olfspring from those of the parent cover and suggesting diversified characters of the elements involved, not limiting the invention to any graphic pictorial, but featuring the mechanical coordination of the invention as a functional base for the receiving of graphic pictorials.

FIGURE 1 showing the over-all plan of the open book cover,

FIGURE I2 is a drawing showing a view of the book cover with the center line indicated as cut to the designated point for its spectific requirement and showing the indicated flared lines cut to their designated points for their specific requirements which also gauge and determine and measure the application of the cover to the book at these points. Also showing the space allotted for the adhesives with its protective coverings,

FIGURE 3 is a view of the book cover showing the sections to be cut first and showing one half of the longitudinal sections folded over a books outer bindings, also showing the adhesives protective covering partially removed,

FIGURE 4 is a view of the cover having all longitudinal sections folded into place and the shorter end sections folded over and sealed to the underlying longitudinal sections, and showing the center sections positioned for the opening at the center ends of a book which is created when a book is opened widely,

FIGURE 5 showing the front and the back of a book covered and the center section of the book cover having been cut and showing one-half of this center section having been folded over and inserted and tucked into the books center title spine opening,

FIGURE 6 showing a section of a corner and the removing of the adhesives protective covering by the peeling off of the protective covering,

FIGURE 7 showing the plan of the open book cover and showing some of the diversified characters of the elements involved, and as having hook corners with identification points as functional coordinates with the mechanics of this book cover.

FIGURE 8 showing the body of the cover as in FIG- URE 2, however, showing corners having hooks with identification points which may be diversified characters of the elements involved,

FIGURE 9 is a plan of the book cover showing its longitudinal sections folded into position for receiving the end sections. The other end showing the end section folded over in position for identifying the position of the slits to be cut into the underlying longitudinal sections for the receiving of the hook corners,

FIGURE 10 showing the method of identifying the cutting position of the slits to be cut into the underlying longitudinal sections,

FIGURE 11 showing the slits for the receiving of the hook corners,

FIGURE 12 showing the cover positioned and hooked, and showing all edges of the books bindings covered.

And now referring to the figures and identifying them by their representative numerals and alphabetical letters, specifying the material which is of the utmost importance to this invention, and is in obligatory, functional, correlation and coordination with the mechanics of this book cover, and has been tested against extreme heat and extreme cold with great satisfaction, and its complementing qualities being; transparent, translucent, semi-opaque, and opaque, and embossed material.

The covers are to be cut and generally comprise an integral sheet of rectangular material, and will be produced in limited, desired sizes andit is estimated that these desired sizes will meet nearly any requirement as they are adjustable to height, thickness and width, and right is reserved to make the :book covers in any required size, and if the need so arise, to make the covers of more than one piece of material by splicing and reinforcing the material to meet the needs of that particular demand, and now referring especially to FIGURE 1 showing the component parts as diversified characters of the elements involved, and as constituent parts thereof.

First section, FIGURE 1.The flared lines 1-A, shown in FIGURES 1, 2, 3, 4, 5, 7, 8, 9, 12 which scale the single line 1, constitute the first sections and are so designed to furnish a detailed, accurate gauge for the correct cutting of the book cover at its center back, and is a guide and a gauge for the determining of the height and thickness of a book ranging from a thin pamphlet to a very thick book, and aligns the cover to the book to be covered, and also when applied to a book forms an added secureness and protection to the center back title spine of a book. These multiple flare lines 1A scale the center line 1 and flare outward to the outer edge of the elongated sides of the book cover, and these lines constitute the first section of the book cover to be cut. By aligning the book along the center line of this section 1 of the book cover and by indicating the height and thickness of a book by marking the center line 1 slightly above the center back of the book, and the flare lines LA at a point slightly above the points where the corners of the center back of a book, title spine, indicates the first section is determined, and by cutting the indicated three lines down to their determined points and by repeating this same procedure for the opposite sides and ends 1, 1-A, of the book cover the first sections are released and form the inner ends of the longitudinal folds 2 shown in FIGURE 2 and 3. The book cover is now positioned and ready for the application of the second section of the book cover.

Second seclion.With this invention the outer paralleled longitudinal sections lying at an opposite position from the center flare lines 1, and 1-A constitute the elongated side of this book cover, and may have a minimum of four sections, and are identified as 2 and are the first sections of the book cover to be applied when covering a book by folding these sections inward and downward over the edge of the books back and front, and right to conform to the requirements of the book cover is reserved, and to coordinate and correlate these constituents as the diversified characters of the elements involved and required and as a base for pictorial advertisements. The inside ends of these sections 2 contact and may be partially included and become a part of the 1-A lines at the center back of the book cover, and described above, the thickness of the book being the determining factor, and the opposite ends of the sections 2, terminates in a downward and inwardly curved concave line 5, extending from the outer elongated side edge of section 2 of the book cover on one end of this curved line, and to its inner high point on the inside end, contacting a shorter straight line 6, which is lying opposite and in cross position, and this line 6 contacts a line 7 which may be diversified to coordinate as a partial outline for hook corners FIGURES 7, 8, 9, line 7-A, and this line 7 is intercepted at a point substantially below the end edges of the book cover by another straight line 8, paralleling the end of the cover and the space between this line 8 and the outer edge of the book cover is designated for the adhesives 9, with its protective covering 9A, which is on the reverse side of the book cover from that of the printed outlines of the corners and the hook corners. These corners are a part of fold section 2, lines 5 and 6 extending into the end section 3 and lines 7, 7-A, 8 and have become the outlines for the shorter sides of the book cover, and by the use of these constituents a flat and less bulky corner fold is created and has allowed the adhesived spaced 9 which is on the reverse side of and the outer corner of section 3 to come into direct contact with the folded over underlying section 2 for sealing.

Third secti0n.-This third section is also a part of the second section 2 as already described and having the same basic lines 7 and 8 connecting with line 6, and as a general rule the book cover will be produced in the simplified form as shown in FIGURE 1, and the pliability and tolerance of the material enables the corners to be brought tightly into position and after the removal of the protective covering 9A, from the adhesives in space 9 and to simply be sealed by pressing the adhesived space 9 in section 3 down onto the underlying section 2 and here by creating a snugly fitting and securely held corner, however, right is reserved to conform, coordinate, and correlate the ordinarily prerequisite prerogative of advertising for those corners requiring irregular outline, 7-A. Examples are shown in the drawings showing corners of the book covers FIGURES 7, 8, 9, 10, 11, 12, and these corners in turn will require to be coordinated and correlated to the slits which are to be cut into the already described sections 2, FIGURE 11 as ll-A, and these slits are located in section 2 and their corresponding identification points are located advantageously in the corners of section 3 and are functionally coordinated.

Identification p0iIzts.The identification points which may be perforated openings and are guides and guages for the cutting of the slits which will be in the underlying sections 2 and already described, and these points are located and positioned advantageously in the corners which have hook corners and all corners having hooks, 7A, FIGURES 7, 8, 9, 10, 11 and 12 and identified as 12 and these identification points will indicate and coordinate, functionally correlating the corners to the underlying sections 2 indicating the correct position for the cutting of the slits, and explaining their usage further; it is necessary to fold the end section 3 over the end of the book accord ing to the size of the book which places the section 3 over the underlying longitudinal sections 2 and this brings the identification points 12 which are in the corners over the position for the indicating of the slits FIGURE 11, and shown as 11A, and by using the point of a pin, 12-A FIGURE 10, to pierce and mark through the identification points and perforated openings 12, to the underlying section 2 the correct legnth and outline of the slits to be cut are determined and are ready to receive the hooked corners.

SliIs.The slits, FIGURE 11, and shown as 11-A, Will be cut and coordinated to correlate with the require ments of the corners and positioned in the underlying, elongated, longitudinal sections 2 by the thickness and width of the book to be covered and are identified as to length and outline by their corresponding identification points 12 and shown in FIGURES 7, 8, 9, 11 and 12 in these drawings.

T o seal.-On the reverse side of the book cover and on that side of the cover which will be the inside of the cover and located at the corners is the designated space for receiving the adhesives 9 with its protective covering 9-A, FIGURE 6, showing a corner from which the protective covering 9A is being removed from off the adhesive section 9. The use of the protective covering 9-A is obligatory as the adhesives which are required for the sealing of plastics and this moisture proof pliable material demands protection from the air and must remain in a viscous state until sealed, and this protective covering is peeled off at the time that the cover is to be sealed, and the corner '7-A may be hooked through the slits 11-A positioned in the underlying section 2, and then space 9, is pressed down and sealed to the underlying section 2, and this hooking and sealing procedure has created a very securely held corner. As a general rule the book cover will be produced in the simplified form as has already been shown as FIGURES l, 2, and 3, by simply folding the sections 3 over the underlying sections 2, to a position insuring a snug fitting corner and by removing the protective covering 9-A from ofi the adhesive 9, and pressing it down onto the underlying section 2, to seal and the pliable tolerance of the material combined with the specified adhesive creates a very satisfactory fusion, and right is reserved to apply such securing properties as may be required to any particular section of the book cover that will meet the covers requirements.

To enclose the edges of the center back title spine of the book by the application of the first section of the book cover, 1-A FIGURE 4, and one half of 1-A is shown as having been applied in FIGURE 5, and this section l-A is in position and ready to be folded over and tucked into the center back title spine of the book, and into the opening 1-B, FIGURE 5, which is between the bound pages of the book and its binding and this mechanical function of the book cover requires the pliability and tolerance and functional weight and guage of the material and by tucking these indicated and cut sections 1, 1-A over the edge of the books binding and into the opening at the center back title spine of a book which is created when a book is opened, 1-B a complete enclosure of the edges and hinges of the book to which the hardest usage is received is newly and protectively accomplished, and an added secureness for keeping the cover in position is accomplished without distortion or bulging of the books binding. By the above disclosed, described, and illustrated mechanics a new and snug fitting multiple purpose cover is created and is herein described and disclosed.

In summation, it is herein cited that the book cover has securely enclosed all edges of the book by its own correlated and coordinated mechanics and this has been accomplished without any adhesives or glues coming into direct contact with the book itself, and has also been uniquely secured at the center back of the book. I claim broadly the right to correlate and coodinate the diversified constituent parts with the character of the elements involved, and right to employ equivalent instrumentalities as prerequisite prerogative coming within the ultimate intention of this invention, and it is understood that I do not limit myself to the precise construction herein disclosed.

Having described my invention and illustrated its uses, what I claim as new and desire to secure by Letters Patent 1s:

1. A covering structure for a book, comprising:

(a) a unitary, generally-rectangular body having a longitudinal axis and a transverse axis perpendicular to said longitudinal axis;

(b) said body having each of its corners cut out to define a cut-out edge curving inwardly toward said longitudinal axis and thence outwardly toward the transverse side edge of said body, and thereafter following a first straight line inwardly toward said longitudinal axis, a second straight line outwardly toward said side edge, a third straight line inwardly toward said longitudinal axis and a fourth line outwardly toward said side edge;

(0) a hook portion integrally formed at each of the corners of said body member adjacent the point at which said fourth line approaches said side edge of said body;

(d) said hook portion continuing as an extension of said fourth line, and, therafter, extending transversely outwardly, longitudinally inwardly, and transversely inwardly to form a hook having at least about 270 degrees of closure;

(e) said hook portion having a pair of transversely spaced perforations formed in the transverse out- Ward section of said hook portion;

(f) said body portion having a second pair of perforations, transversely spaced the same distance as the said first pair of perforations, formed therein the same distance from said longitudinal axis of said body as said first pair of perforations;

(g) said first and second perforations being located and spaced such that, when the longitudinal flaps of said body are folded inwardly over the longitudinal edges of said book and the transverse flaps of said body are folded inwardly over the transverse edges of said book and over said longitudinal flaps, marks made on said longitudinal flaps by a marker passing through said perforations will define the terminal ends of a pair of parallel, longitudinal slits through which said hook portions can pass in hooking engagement with the longitudinally-formed, narrow bar between said slits;

(h) a first guide line formed on said body co-incident with the central transverse axis of said body;

(i) a plurality of pairs of second guide lines formed on said body and extending outwardly from each side of said first guide line toward the longitudinal edges of said body to form acute angles with said first guide line;

(3') said pairs of second guide lines being spaced from points adjacent the ends of said first guide line to points transversely spaced apart a distance substantially less than the height of the smallest book to be covered and given pairs of said second guide lines defining pairs of points at opposite corners of the spline of said book;

(k) a pressure-sensitive adhesive on the interior surface of said body adjacent each of the corners of said body member defined by said fourth line of said cut-out and said transverse side edge of said body;

(1) a removable, non-adhesive covering mounted over said pressure-sensitive adhesive; and

(In) said body being of sufficiently thin and pliable plastic material that cutting along said first guide line to the edges of the spline of a book and along said given pair of second guide lines to the corners of said spline and, thereafter, tucking the two resultant outwardly-flared tabs into the space between said spline and the bound back edges of the pages of said book, in a manner such that said tabs overlap one another at the first guide line cut, said tabs do not interfere with the closing of said book when so inserted.

2. A covering structure for a book, comprising:

(a) a unitary, generally-rectangular body having a longitudinal axis and a transverse axis perpendicular to said longitudinal axis;

(b) said body having each of its corners cut out to define a cut-out edge curving inwardly toward said longitudinal axis and thence outwardly toward the transverse side edge of said body, and thereafter following a first straight line inwardly toward said longitudinal axis, a second straight line outwardly toward said side edge, a third straight line inwardly toward said longitudinal axis and a fourth line outwardly toward said side edge;

(c) a hook portion integrally formed at each of the corners of said body member adjacent the point at which said fourth line approaches said side edge of said body;

((1) said hook portion continuing as an extension of said fourth line, and, thereafter, extending trans versely outwardly, longitudinally inwardly, and transversely inwardly to form a hook having at least about 270 degrees of closure;

(e) said hook portion having a pair of transversely spaced perforations formed in the transverse outward section of said hook portion;

(f) said body portion having a second pair of perforations, transversely spaced the same distance as the said first pair of perforations, formed therein the same distance from said longitudinal axis of said body as said first pair of perforations;

(g) said first and second perforations being located and spaced such that, when the longitudinal flaps of said body are folded inwardly over the longitudinal edges of said book and the transverse flaps of said body are folded inwardly over the transverse edges of said book and over said longitudinal flaps, marks made on said longitudinal flaps by a marker passing through said perforations will define the terminal ends of a pair of parallel, longitudinal slits through which said hook portions can pass in hooking engagement with the longitudinal-formed, narrow bar between said slits;

(h) a first guide line formed on said body co-incident with the central transverse axis of said body;

(i) a plurality of pairs of second guide lines formed on said body and extending outwardly from each side of said first guide line toward the longitudinal edges of said body to form acute angles with said first guide line;

(j) said pairs of second guide lines being spaced from one another along said first guide line from points adjacent the ends of said first guide line to points transversely spaced apart a distance substantially less than the height of the smallest book to be covered and given pairs of said second guide lines defining pairs of points at opposite corners of the spline of said book; and

(k) said body being of sufficiently thin and pliable plastic material that cutting along saidfirst guide line to the edges of the spline of a book and along said-given pair of second guide lines to the corners of said spline and, thereafter, tucking the two resultant, outwardly-flared tabs into the space between said spline and the bound back edges of the pages of said book, in a manner such that said tabs over-lap one another at the first guide line cut, said tabs do not interfere with the closing of said book when so inserted.

3. A covering structure for a book, comprising:

(a) a unitary, generally-rectangular body having a longitudinal axis and a transverse axis perpendicular to said longitudinal axis;

(b) said body having each of its corners cut out to define a cut-out edge curving inwardly toward said longitudinal axis and thence outwardly toward the transverse side edge of said body, and thereafter following a first straight line inwardly toward said longitudinal axis, a second straight line outwardly toward said side edge, a third straight line inwardly toward said longitudinal axis and a fourth line outwardly toward said side edge;

(e) a hook portion integrally formed at each of the corners of said body member adjacent the point at which said fourth line approaches said side edge of said body;

(d) said hook portion continuing as an extension of said fourth line, and, thereafter, extending transversely outwardly and thence longitudinally inwardly;

(e) said hook portion having a pair of transversely spaced perforations formed in the transverse out- .ward section of said hook portion;

(f) said body portion having a second pair of perforations, transversely spaced the same distance as said first pair of perforations, formed therein the same distance from said longitudinal axis of said body as said first pair of perforations;

(g) said first and second pair of perforations being located and spaced such that, when the longitudinal flaps of said body are folded inwardly over the longitudinal edges of said book and the transverse flaps of said body are folded inwardly over the transverse edges of said book and over said longitudinal flaps, marks made on said longitudinal flaps by a marker passing through said perforations will define the terminal ends of a pair of parallel, longitudinal slits through which said hook portion can pass in booking engagement with the longitudinally-formed, narrow bar between said slits;

(h) first guide lines formed on said body coincident with the central transverse axis of said body and extending inwardly from each longitudinal edge of said body a distance such that the transverse distance between said lines is substantially less than the height of the smallest book to be covered; and

(i) a plurality of pairs of second guidelines formed on said body and extending outwardly from each side of said first guide lines toward the longitudinal edges of said body to form acute angles with said first guide lines;

(j) said pairs of second guide lines being spaced from one another along said first guide lines from a point adjacent the outermost ends of said first guide lines to points transversely spaced apart a distance substantially less than the height of the smallest book to be covered and given pairs of said second guide lines defining pairs of points at opposite corners of the spline of said book.

4. A covering structure for a book, comprising:

(a) a unitary, generally-rectangular body having a longitudinal axis and a transverse axis perpendicular to said longitudinal axis;

(b) said body having each of its corners cut out to define a cut-out edge curving inwardly toward said longitudinal axis and thence outwardly toward the transverse side edge of said body, and thereafter following a first straight line inwardly toward said longitudinal axis, a second straight line outwardly toward said side edge, a third straight line inwardly toward said longitudinal axis and a fourth line outwardly toward said side edge;

(e) a hook portion integrally formed at each of the corners of said body member adjacent the point at which said fourth line approaches said side edge of said body;

((1) said hook portion continuing as an extension of said fourth line, and, thereafter, extending transversely outwardly and thence longitudinally inwardly;

(e) said hook portion having a pair of transversely spaced perforations formed in the transverse out- Ward section of said hook portion;

(f) said pair of perforations being located and spaced such that, when the longitudinal flaps of said body are folded inwardly over the longitudinal edges of said book and the transverse flaps of said body are folded inwardly over the transverse edges of said book and over said longitudinal flaps, marks made on said longitudinal flaps by a marker passing through said perforations will define the transverse spacing of a pair of parallel, longitudinal slits through which said hook portion can pass in hooking engagement with the longitudinally-formed, narrow bar between said slits;

(g) first guide lines formed on said body coincident with the central transverse axis of said body and eX- tending inwardly from each longitudinal edge of said body a distance such that the transverse distance between said lines is substantially less than the height of the smallest book to be covered; and

(h) a plurality of pairs of second guide lines formed on said body and extending outwardly from each side of said first guide lines toward the longitudinal edges of said body to form acute angles with said first guide lines;

(i) said pairs of second guide lines being spaced from one another along said first guide lines from a point adjacent the outermost ends of said first guide lines to points transversely spaced apart a distance substantially less than the height of the smallest book to be covered and given pairs of said second guide lines defining pairs of points at opposite corners of the spline of said book.

References Cited by the Examiner UNITED STATES PATENTS 906,958 12/ 1908 Stephens 22984 961,548 6/1910 Southworth 281-34 990,262 4/ 1911 Hedges 281-34 1,519,948 12/1924 Zuckerman 28134 1,562,504 11/1925 Jackson 28134 1,618,733 2/ 1927 Sharrard 281-34 1,643,418 9/1927 Peugh 281-34 2,057,987 10/ 1936 Walraven 281-34 2,145,098 1/1939 Sharp 28134 3,017,201 1/ 1962 Armson 28134 JEROME SCHNALL, Primary Examiner.

25 LAWRENCE CHARLES, CHARLES A. WILLMUTH,

EUGENE R. CAPOZIO, Examiners. 

1. A COVERING STRUCTURE FOR A BOOK, COMPRISING: (A) A UNITARY, GENERALLY-RECTANGULAR BODY HAVING A LONGITUDINAL AXIS AND A TRANSVERSE AXIS PERPENDICULAR TO SAID LONGITUDINAL AXIS; (B) SAID BODY HAVING EACH OF ITS CORNERS CUT OUT TO DEFINE A CUT-OUT EDGE OF ITS CORNERS CUT OUT TO LONGITUDINAL AXIS AND THENCE OUTWARDLY TOWARD THE TRANSVERSE SIDE EDGE OF SAID BODY, AND THEREAFTER FOLLOWING A FIRST STRAIGHT LINE INWARDLY TOWARD SAID LONGITUDINAL AXIS, A SECOND STRAIGHT LINE OUTWARDLY TOWARD SAID SIDE EDGE, A THIRD STRAIGHT LINE INWARDLY TOWARD SAID LONGITUDINAL AXIS AND FOURTH LINE OUTWARDLY TOWARD SAID EDGE; (C) A HOOK PORTION INTEGRALLY FORMED AT EACH OF THE CORNERS OF SAID BODY MEMBER ADJACENT THE POINT AT WHICH SAID FOURTH LINE APPROACHES SAID SIDE EDGE OF SAID BODY; (D) SAID HOOK PORTION CONTINUING AS AN EXTENSION OF SAID FOURTH LINE, AND, THEREAFTER, EXTENDING TRANSVERSELY OUTWARDLY, LONGITUDINALLY INWARDLY, AND TRANSVERSELY INWARDLY TO FORM A HOOK HAVING AT LEAST ABOUT 270 DEGREES OF CLOSURE; (E) SAID HOOK PORTION HAVING A PAIR OF TRANSVERSELY SPACED PERFORATIONS FORMED IN THE TRANSVERSE OUTWARD SECTION OF SAID HOOK PORTION; (F) SAID BODY PORTION HAVING A SECOND PAIR OF PERFORATIONS, TRANSVERSELY SPACED THE SAME DISTANCE AS THE SAID FIRST PAIR OF PERFORATIONS, FORMED THEREIN THE SAME DISTANCE FROM SAID LONGITUDINAL AXIS OF SAID BODY AS SAID FIRST PAIR OF PERFORATIONS; (G) SAID FIRST AND SECOND PERFORATIONS BEING LOCATED AND SPACED SUCH THAT, WHEN THE LONGITUDINAL FLAPS OF SAID BODY ARE FOLDED INWARDLY OVER THE LONGITUDINAL EDGES OF SAID BOOK AND THE TRANSVERSE FLAPS OF SAID BODY ARE FOLDED INWARDLY OVER THE TRANSVERSE EDGES OF SAID BOOK AND OVER SAID LONGITUDINAL FLAPS, MARKS MADE ON SAID LONGITUDINAL FLAPS BY A MARKER PASSING THROUGH SAID PERFORATIONS WILL DEFINE THE TERMINAL ENDS OF A PAIR OF PARALLEL, LONGITUDINAL SLITS THROUGH WHICH SAID HOOK PORTIONS CAN PASS IN HOOKING ENGAGEMENT WITH THE LONGITUDINALLY-FORMED, NARROW BAR BETWEEN SAID SLITS; (H) A FIRST GUIDE LINE FORMED ON SAID BODY CO-INCIDENT WITH THE CENTRAL TRANSVERSE AXIS OF SAID BODY; (I) A PLURALITY OF PAIRS OF SECOND GUIDE LINES FORMED ON SAID BODY AND EXTENDING OUTWARDLY FROM EACH SIDE OF SAID FIRST GUIDE LINE TOWARD THE LONGITUDINAL EDGES OF SAID BODY TO FORM ACUTE ANGLES WITH SAID FIRST GUIDE LINE; (J) SAID PAIRS OF SECOND GUIDE LINES BEING SPACED FROM POINTS ADJACENT THE ENDS OF SAID FIRST GUIDE LINE TO POINTS TRANSVERSELY SPACED APART A DISTANCE SUBSTANTIALLY LESS THAN THE HEIGHT OF THE SMALLEST BOOK TO BE COVERED AND GIVEN PAIRS OF SAID SECOND GUIDE LINES DEFINING PAIRS OF POINTS AT OPPOSITE CORNERS OF THE SPLINE OF SAID BOOK; (K) A PRESSURE-SENSITIVE ADHESIVE ON THE INTERIOR SURFACE OF SAID BODY ADJACENT EACH OF THE CORNERS OF SAID BODY MEMBER DEFINED BY SAID FOURTH LINE OF SAID CUT-OUT AND SAID TRANSVERSE SIDE EDGE OF SAID BODY; (L) A REMOVABLE, NON-ADHESIVE COVERING MOUNTED OVER SAID PRESSURE-SENSITIVE ADHESIVE; AND (M) SAID BODY BEING OF SUFFICIENT THIN AND PLIABLE PLASTIC MATERIAL THAT CUTTING ALONG SAID FIRST GUIDE LINE TO THE EDGES OF THE SPLINE OF A BOOK AND ALONG SAID GIVEN PAIR OF SECOND GUIDE LINES TO THE CORNERS OF SAID SPLINE AND, THEREAFTER, TUCKING THE TWO RESULTANT OUTWARDLY-FLARED TABS INTO THE SPACE BETWEEN SAID SPLINE AND THE BOUND BACK EDGES OF THE PASES OF SAID BOOK, IN A MANNER SUCH THAT SAID TABS OVERLAP ONE ANOTHER AT THE FIRST GUIDE LINE CUT, SAID TABS DO NOT INTERFERE WITH THE CLOSING OF SAID BOOK WHEN SO INSERTED. 